How to Write a Letter for Sick Day

Victoria Jul 07, 2026

Feeling under the weather and need to take a sick day? Writing a letter to inform your employer can seem daunting, but it doesn't have to be. A well-crafted letter can help ensure your absence is understood and accommodated. Here's a step-by-step guide to help you write an effective sick day letter.

How to Write a Sick Day Email (+ a Template)
How to Write a Sick Day Email (+ a Template)

Before you start, remember that honesty, clarity, and professionalism are key. Your letter should provide enough information for your employer to understand your situation without going into excessive detail. Let's dive into the process.

Urgent Hospital Bill Assistance Needed | PDF
Urgent Hospital Bill Assistance Needed | PDF

Understanding Company Policy

First, familiarize yourself with your company's sick leave policy. This information is usually outlined in your employee handbook or contract. Knowing the rules will help you understand what's expected of you and what you're entitled to.

a notepad, pen and sticky pad sitting on a desk next to a sign that says you are feeling sick
a notepad, pen and sticky pad sitting on a desk next to a sign that says you are feeling sick

If you're unsure about any aspect of the policy, don't hesitate to ask your HR department. It's better to be clear about the process before you need to take sick leave.

Preparing to Write the Letter

a poem that says sweet get well messages on the front and back of a card
a poem that says sweet get well messages on the front and back of a card

Before you start writing, gather all the necessary information. You'll need to include your name, your employer's name, the date, and the reason for your absence. If you've seen a doctor, include their details as well.

Next, decide on the tone of your letter. It should be professional yet sympathetic. After all, you're not trying to get out of work, but rather, you're unable to perform your duties due to illness.

Gather Necessary Information

What to Do when You Are Sick
What to Do when You Are Sick

Here's what you should have on hand:

  • Your full name and your employer's full name
  • The date you're writing the letter
  • The dates you'll be absent
  • A brief description of your illness or reason for absence
  • Your doctor's details (if applicable)

Choose the Right Tone

How To Write A Professional Sick Day Email (With Examples)
How To Write A Professional Sick Day Email (With Examples)

Your letter should convey that you're genuinely unwell and regretful about having to miss work. Here's a simple way to achieve this:

  • Be honest and concise about your illness
  • Express regret for any inconvenience caused
  • Assure your employer that you'll do your best to catch up on work when you return
52K views | Reel by English Class
52K views | Reel by English Class
a poem written in black and white with the words get well soon
a poem written in black and white with the words get well soon
the poem is written in black and white, which reads sicknesss starters as described by the lovey
the poem is written in black and white, which reads sicknesss starters as described by the lovey
Self care for when you are sick🤍
Self care for when you are sick🤍
110 Get Well Wishes and Messages to Write In a Card - Love Text Messages
110 Get Well Wishes and Messages to Write In a Card - Love Text Messages
several pieces of paper taped to the ground with writing on them and an open when you are sick sign
several pieces of paper taped to the ground with writing on them and an open when you are sick sign
To the Person with Health Struggles. #31Days31Letters
To the Person with Health Struggles. #31Days31Letters
Fundraising Letter For Someone Sick | Templates at allbusinesstemplates.com
Fundraising Letter For Someone Sick | Templates at allbusinesstemplates.com
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letter myself
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How To Write Sick Day Email To: 5 Template Examples
this application for sick leave
this application for sick leave
a list with the words letters to write
a list with the words letters to write
someone holding up a note that says, you are strong you are brave you are loved you are not alone
someone holding up a note that says, you are strong you are brave you are loved you are not alone
open when you’re sick
open when you’re sick
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Letter to Your Friend About Your Illness
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Open when you are sick
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a piece of paper with writing on it
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Open when you feel sick
stay here
stay here
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How to Write a Sincere Just-Because Letter

Writing the Letter

Now that you have all the information and have decided on the tone, it's time to write the letter. Here's a simple structure to follow:

Start with a salutation, followed by the body of the letter, and end with a closing and your signature.

Salutation

Address your letter to your direct supervisor or the HR department. Use their title (Mr., Ms., Dr., etc.) followed by their last name. If you're unsure, a simple "Dear Sir/Madam" is acceptable.

Body of the Letter

Here's a suggested format for the body of your letter:

  • First paragraph: State your name, the dates you'll be absent, and the reason for your absence
  • Second paragraph: Provide more details about your illness or reason for absence, if necessary
  • Third paragraph: Express regret for any inconvenience caused and assure your employer that you'll do your best to catch up on work when you return

Closing and Signature

End your letter with a professional closing, such as "Sincerely" or "Best regards". Follow this with a comma, two spaces, and your full name. If you're writing a physical letter, leave space for your signature.

Submitting the Letter

Once you've written your letter, make sure to submit it according to your company's policy. This could be via email, fax, or physical mail. If you're unsure, ask your HR department for guidance.

If you're using email, make sure to check your spelling and grammar before hitting send. Also, consider sending the letter from your work email address to maintain professionalism.

Follow-Up

After submitting your letter, it's a good idea to follow up with your employer to ensure they received it. This also gives you the opportunity to provide any additional information or clarify any details.

If you're still unwell after your planned sick leave, you may need to extend your absence. In this case, follow the same process, but make sure to provide an update on your health and when you expect to return to work.

Taking a sick day is never ideal, but with a well-written letter, you can ensure that your absence is understood and accommodated. Remember, honesty, clarity, and professionalism are key. With these principles in mind, you can write an effective sick day letter that puts your employer's mind at ease.